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Noun: boulder clay  bówl-dur kley
  1. Unstratified soil deposited by a glacier; consists of sand and clay and gravel and boulders mixed together
    - till

Derived forms: boulder clays

Type of: dirt, soil

Encyclopedia: Boulder clay

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bouldered
bouldering
bouldery
boule
boulevard
boulevardier
bouleversement
Boulez
boulle